Machine for molding concrete blocks.



1. o. DAWSON.- MACHINE FOR MOLDING CONCRETE BLOCKS.

APPLICATION FILED JUNE 28, 1916.

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` @Dam-25am? J. 0. DAVISON.

MACHINE FOR MOLDING CONCREE BLOCKS.

APPLICATION r|LEDsuNE28,1916.

1,241,932. Patented Oct. 2,' 1917.

2 SHEETS-SHEET 2.

@mom/vilo@ UNHEDSTATES Pcs-TEN@ Ome-- JOHN'lO..'D,Av1so1\r,jor OAKLAND,ilyrissiisfsrrri.

'v MAcIiiNE Foa Momma' coNcaETE :BLocKsl V v To-aZZ whom z't-mayconcern;- e l v Be it `known ,that I, JOHN O. DAvisoN, la citizen of theUnitedStates, residing at Oakland, in the county-of Yalobusha and Stateof Mississippi, have invented new and useful Improvements in Machinesfor Molding Concrete Blocks,of whichA the following is a specification.Y

YThis invention/is an improved machine formolding concrete blocks andmore especiallysuch concrete blocks as are employed in thebuildingconstruction described and claimed in Letters Patent ,of the UnitedStates :,l:/.f1,141,445.'` The object .of my invention is to provide aniimproved block Vmolding machine which is simple in construction, strongand durable,v is portable,

and which is adjustable and adapted for.

-the manufacture of various kinds ofblocks. ,Theinvention vconsists inthe features of construction, combination, and arrangement Yofdevices,hereinafter fullyv described and claimed, v e

In the accompanying drawingsf;-; -Figure l is, a side elevation of aconcrete Ablockmolding machine-,constructed and arranged in accordancewith my invention.y

NFig. 2 is a longitudinal, V vertical sectional j view of the same.

Fig-4 is aplan of the i Fig. fisa detail 'perspective -view of aV Y Fig.6.*is a Fig. 3 is a vertical transverse sectional view of the same. l

same.

pallet ,board forusein the kmold for moldingEblocks.-'

i A i detailed elevation, partlyf in section', of,` theInold. e

Y Fig. 7 is; a.detailed vertical" longitudinal sectional viewsof thesame.`

1Fig.8 is -adetailed perspectiveyiew of one of the side members of themold.

i Fig. 9V vis a detailed `perspective view `of Ytwo ofthepallet boardsand the partition v; ing ito, ythe.kindjof.-concrete blocks, to v be Yplates Y andT blocks in operative relation thereto'.

lviews respectively of afformlof mold and f 'isprovided at the lowerside'with a base f3 which forms afledge` ore flange 45thatextendsarou'nd the sdesandends ofthe bed r -Appiietin iediune 2s, 191eAserial-,1510.106,440.

Figs. 10' andhll are detailed perspectiye speiiatioiifrutasPatent. `vPatented oct. 2, 1917.

`block and ois provided rthe corners with .Y

downwardly extending members :5. "These, members :dit .in the verticalIopenings 6 of ysocket members? which'are arranged on -the' innerpsidesoffsupportinglegsy 8 andare lprovided with arms 9 which are rabbeted inAthe supporting legs yand boltedfthereto as shown. Anglev irons 10 areat ,the lower ends of ythe supporting legsrand lare employl fed.forgsecuring them to the floor to'hold -'the molding-machine in iiXedposition.'` 'e V lI also provide apair ofcross bars. 11

which are arranged Aat theends of the. bed :block Vand are provided withmorti'ses '12 which receivetenons 13 that project fromV Each-,bar'lQhas'v aI centrally arranged verticalguide groove 14 on its inner side.Verends 4withfspaced notches-16 in which guide .the-.upper, ends of thesupporting'legs.

ltically arranged guide barsl are on 'the' lends ofthe' mold and are'arranged tormovev vertically inthe guide vgroove`sl14. -The basey of,the bed block is providedfat the 1 lugs 17 are secured,fby"boltsorAthe/like,

said guide lugs engaging opposite sides of the guide bars l'andcoactingv with the grooves j 14 in-I accurately guiding andlcontrolli-nig;y the vertical movements j of the mold and. its guidejbars15. 'Iheend members :1S-of the mold arev providefdontheir. outer sideswith centrally arrangedv lugs 19: and the 'guidev barsaregprovided neartheir upper ends.

-withmortises 20 to receive said lugsso that f the f moldis firmly andyet vdetachably connected to the Iguide Vbars and Vfor :movementAglever" V21is leini-)loyed for moving the mold verticallyfonthe bedblock` and com-' lever togbefusedv in,` connection with bed blocksland.moldsofvarious lengths, accordinolded. YfTo thus .secure the: fork armsfto,I

angle "portion 24 withy a slot' y25, which .is en-.prises'ahandlef22and` a vpair of.forkarms 1 23. The fork arms Vare,detachably and .ad-

Y justablyisecurettolthe handle to enable the" ,10ov f Vthe handle, eachforkfa'rm isjprovided.` 'its'f gagedrbya lug, 26 on onevarmofanjangle.

iron 27, said angle ironsbeingfboltedj.tothe handle' and beingalsoconnected to the angle members ofthe 'fork arms "by: means. ofbelts '7 yver. "Figsrh 2, and 3, the mold is adapted for simultaneously moldinga/pair of substan- Each fork arm 23 also has a vdownwardly extendingmember 32 which is provided.

'of' eachgnide bar 15 and forms a vert-ical slot 37 which is open at itsupper end. The members "82 of the fork arms of the lever extenddownwardly in the slots 37 and said fork arms are connected'to the saidbars 15 by pivots 38 which pass through said brackets 36' and slots 37and said pivots may be engaged by any of the ratchet notches 37,

so that the fork arms of the lever mayI be adjustably, pivotallyconnected tothe guide bars of the mold. This lever thus constructedv isvery powerful and enables the mold to be readily moved downwardly andupwardly `with very slight effort on the part of the operator andmoreover the lever connections hereinbefore described confine thevangular movements of the lever to a comparatively small number ofdegrees and the lever Yis prevented from striking the lugs of themachine on thedownward stroke of the le- In the form of the moldillustrated in tially E-shaped blocks which are adapted to break 'jointsand to 4directly interlock asin an interior or partition wall, or to beengaged with and connected` in open, spaced 'relation by I blocks in anouter' wall construction.` Hence the vend members' 18 of the moldareconnected together by'a centrally arranged partition A89' which isprovided on opposite sides' with T-shaped 'former's 40. E-'shaped palletboards 41 are provided for use in the mold and are/placed in the bot.

tom ofthe mold and on ythe upper sideof Y the bed block 1, before theconcrete is placed iin the mold, the mdldbeing of Vcourse raised,

i so astozextend above the bed block. lVhen .the concrete block orblocks have lbeen formed inthe mold, the Vlever 4is `moved downwardly,thusv causing the mold to be lalso lowered and to' uncoverthesides ofthe -"molded block or blocks, together'with the pallet board or boardsmaybe removed from the bed block as will be understood. Hence themachine lis adapted toinanufacture' the "jblocks veryfrapidlyandfeconomically.'

The end members 18 of the mold"aree`a'ch provided with rabbets 42"-atopposite sides.

',The side members 43 1 are reversible 'and f eachis provided in oneside with grooves 44 to receive the tongues of the rabb'ets and 'in' fthe opposite side with tongues 45 to vengage Y in the grooves formed bythe rabbets. Then the side members are'in the first named posi# tion,with their grooves 44 engaged by the tongues of the rabbets, the blockmolds will be .narrower than when said members are arranged with theirtongues 45 engaged in the grooves of thelrabbets, it being understoodthat the side members of the mold may -be arranged with either sideoutermost.

Said side members are secured to the end members by bolts 46. When theside members are thus bolted to the end members of the mold, the mold isnecessarily adapted for molding only smoothfaced blocks.

ln order to adaptfthe inoldfor use in molding vblocks with anundressedrtone face,A

the side members 43 Aare discarded, and 'the members 47 are substitutedtherefor. 1 VThe said members 47 have roughened or other suitably formedinner faces,-'aiid lare pro# videdv at their ends with downwardly eX-tcnding', hinged Vlugs 48 which are pivotall-ly connected directly tothe supportingl legs 8 by pivot bolts 49 'whichare countersunkin saidsupporting legs to 4avoid interference in the fork varms of theoperating lever.

Each hinged or pivoted member 47-is`pro-` vided at itsupper' side withvhinged latches 50, said latches having studsv 51 to Aengage in lockingrecesses 52 inV the upper sides of the vend members of the'mold and" tosecure said iside members47 in closedposition on opposite sides' of themold and wh-ile Vthe concrete is being tainped linto the mold. lNhen themold is ready to be moved downwardly, after the yblock is! formed,the-latches areiirst released' and the members 47 turned downwardly" on'their pivots, 'so )that the said members 47 of the mold'are disengagedfrom the-.sides vof the molded block. When it is desired to mold halflength block s, I employ thin steel partition plates?)l which arearranged across the center of the-molds, have their lower edges engagedIin kerfs in Vthe palletrboardsj and areV provided at'their vupperends'with blocks 54 lwhich* `have notched edges that extendslightly'over-the sides ai'id center `of thefmold andA are provided withdowels 55 whic'hengage infdowel openings 5611i the sides andcenter ofthe mold. In tamping'theconcretepcare should `be taken to tampboth endsofthe mold alike so as to balance the members on opposite sides of thepartition plates. When the Vmolds lare ready tof-be Vpi'jessed down,vthe blocks 54 are `first removed# The partition plates remain in placeunt-il the 'concrete hardens. .Y Y

VTo4 lock the mold"4 in `raisedpositioiiffl i provide bolts57 which aremounte'dinguide casings 58 onthe Vcenters'o'fthecrossjbars 12jV Thesebolts arefprovidedf'with operati ing knobs'59 andmay'begengaged with"and disengaged from openings?f6()K with fwhich the guide bars 15' areprovided. The said guide barsv are Aalso provided Awitlrliallf-w'ayopenings 61 with'which the said lbolts-mayEv be engaged when it isdesired to mold foot width blocks, as will be understood. y

In Figs. l0 and 11 respectively, I show a form of mold 2b and bed block1* for use in the machine in molding three I blocks simultaneously. Themold may be modied in form to permit the molding of only two or of agreater number of such blocks as may be desired. Q

Various modifications may be made'in the construction of the mold, bedblocks, and other parts of the device, Without departing from the spiritof my invention and within the scope of the appended claims.

I-lavin described the invention, what is claimed is: Y

1. In a molding machine of the class described, a bed block, asupporting frame for the bed block including elements arranged at theends of the bed block and provided with vertical guide grooves, a moldmovable vertically on the bed block and provided with guides arranged tooperate in said guide grooves and a lever having arms mounted on theframe and pivotally and vertically adjustably connected to the guidesand arranged to operate and to permit vertical adjustment of the mold.

2. In a molding machine of the class described, a bed block, supportinglegs between the upper portions of which the'bed block is arranged, saidsupporting legs having supporting elements for the bed block, cross barsarranged at the ends ol the bed block, connecting the upper ends of thelegs and having vertical guide grooves', a mold having guidesarrangedvto operate 1n saidv grooves and provided with stops to coactAwith the cross bars in limiting upward movement of the mold, and a leverhaving arms 40 pivotally connected to two of the supporting legs andalso pivotally connected to said guides.

3. In a lmolding machine'of the class described, a bed block,supportinglegs be-'4`5 tween the upper portions of which the bed block isarranged, said supporting legs harv-v ing supporting elements for'thebedblock, cross bars arranged at the ends of the bed block, connectingthe Vupper ends of the legs and having vertical. guide grooves, a 1 moldhaving guides arranged to operate in said grooves and provided withstops to coact with the cross' bars in limiting 11pward movement of themold, and a lever Y frocker links mounted on Atwo of the supporting legsand a lever havingr arms'piv-l otally connected to the guides and alsopivotally connected to the rocker links.

In testimony whereof I affix my signature.

JOHN o. Davison.

Copies of this patent may be obtained for five cents each,vby addressingthe Commissioner of Patents,

Washington, '.D. C.

